Chapter 7 Card Protection - Cisco ONS 15454 Reference Manual

7.1 7.1.1 1:1 Protection
7.1.1 1:1 Protection
In 1:1 protection, a working card is paired with a protect card of the same type. If the working card fails,
the traffic from the working card switches to the protect card. You can provision 1:1 to be revertive or
nonrevertive. If revertive, traffic automatically reverts to the working card after the failure on the
working card is resolved.
configuration. Each working card in an even-numbered slot is paired with a protect card in an
odd-numbered slot: Slot 1 is protecting Slot 2, Slot 3 is protecting Slot 4, Slot 5 is protecting Slot 6,
Slot 17 is protecting Slot 16, Slot 15 is protecting Slot 14, and Slot 13 is protecting Slot 12.
Figure 7-1
Table 7-1
Table 7-1
Working Card
DS1-14 or DS1N-14
DS3-12/DS3-12E or
DS3N-12/DS3N-12E
DS3i-N-12
DS3XM-6 (Transmux)
DS3XM-12 (Transmux)
Cisco ONS 15454 Reference Manual, R7.0.1
7-2
Figure 7-1
Example: ONS 15454 Cards in a 1:1 Protection Configuration (SMB EIA)
provides supported 1:1 protection by electrical card type.
Supported 1:1 Protection by Electrical Card
Protect Card
DS1-14 or DS1N-14
DS3-12 or DS3N-12
DS3i-N-12
DS3XM-6 (Transmux)
DS3XM-12 (Transmux) 14
shows an example of the ONS 15454 in a 1:1 protection
Working Slot
2
4
6
12
16
Chapter 7 Card Protection
1:1 Protection
Protection Slot
1
3
5
13
15
17
OL-9217-01